# Subnet Mask Calc — IPv4 Calculator

> Free IPv4 subnet mask and wildcard mask calculator for IT professionals and students. (iPhone/iPad app by John Rouda.)

- Source: https://appshunter.io/ios/app/subnet-mask-calc/id406375326 (this page in markdown: same URL + `.md`)
- Developer: [John Rouda](https://appshunter.io/developer/396597129)
- Category: Utilities, Education
- Price: Free
- Rating: 2.30/5 from 22 App Store ratings · 18 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: American English
- Released: 2010-12-15
- Data updated: 2026-06-08
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/subnet-mask-calc/id406375326/reviews.md

## What is Subnet Mask Calc?

Transform your networking experience with our lightning-fast Subnet Mask Calculator! Unleash the power of seamless calculations even without network connectivity. Dive into a world of convenience, where precision meets simplicity – and it's absolutely free!

Designed for IT engineers seeking swift solutions, this tool is your go-to for effortlessly unraveling network IPs and wildcard masks. It's the ultimate companion for professionals, making complex tasks a breeze.

But that's not all – if you're a networking enthusiast or a student aiming for excellence in Network+ or CCNA certifications, our Subnet Mask Calculator is an invaluable learning aid. Verify your subnetting mastery on the go, ensuring accuracy and boosting your confidence in every step of your networking journey.

Elevate your networking game with our user-friendly, free-to-use Subnet Mask Calculator. Download now and experience the efficiency that sets you apart!

## Key features

- Lightning-fast subnet calculations
- Offline network connectivity
- Calculates IP and wildcard masks
- User-friendly interface
- Ideal for IT engineers
- Learning aid for certifications

## Recent user reviews (10 of 18)

All indexed reviews: https://appshunter.io/ios/app/subnet-mask-calc/id406375326/reviews.md

### 1/5 — Doesn't work on iOS 10.2

*2017-02-28, version 1.5*

Sorry, unable to select any subnet from the scroll wheel and can't calculate as a result, shame, nice interface.  Needs an update and will probably be fine.

### 2/5 — Limited use

*2016-05-26, version 1.5*

Poor choice of shadow font makes display hard to read. Provides classful subnetting only, of little use today. Sorry developer, but not recommended.

### 1/5 — Junk

*2015-09-25, version 1.5*

It is.

### 1/5 — RISKY app!

*2014-08-27, version 1.5*

I ran a scan of this app through Mobileiron and the result shows that it can access the camera, contact, and microphone on my phone. Also track my geo location and could take over twitter acct. DELETE!

### 1/5 — Crash!

*2013-10-31, version 1.5*

Crashes on IOS7.  Lot of space on the screen wasted.  Please enable screen rotate.

### 1/5 — Garbage

*2013-03-25, version 1.5*

I installed this and gave it my best shot. This is worthless.

### 4/5 — Excelente para comenzar!

*2012-10-30*

Excelente programa para aprender...
A+

### 1/5 — This is the worst app I ever used!

*2012-05-20, version 1.5*

The ugly user interface.

### 1/5 — Terrible

*2012-04-25, version 1.5*

It used be twitchy. Now it's unusable. Absolute crap.

### 1/5 — Bad app

*2012-04-11, version 1.5*

Bad GUI！

## Frequently asked questions about Subnet Mask Calc

### What is Subnet Mask Calc used for?

Subnet Mask Calc is a free utility app designed to quickly calculate IPv4 subnet masks and wildcard masks. It simplifies complex networking tasks for IT professionals and students.

### Does Subnet Mask Calc work offline?

Yes, Subnet Mask Calc offers seamless calculations even without network connectivity, making it a convenient tool for use anywhere.

### Who would benefit from using Subnet Mask Calc?

IT engineers, networking professionals, and students preparing for certifications like Network+ or CCNA will find Subnet Mask Calc an invaluable tool for verifying subnetting and understanding network IPs.

### What is the price of Subnet Mask Calc?

Subnet Mask Calc is available for free. It is supported by advertisements.

### Does Subnet Mask Calc have ads?

Yes, Subnet Mask Calc contains advertisements as part of its free monetization model.

### On which devices can I use Subnet Mask Calc?

Subnet Mask Calc is compatible with iPhones, iPads, and iPods, running on iOS devices.

### How often is Subnet Mask Calc updated?

The latest version, 3.0, was updated on July 17, 2025. The app was originally released on December 15, 2010, indicating a history of updates.

### What is the age rating for Subnet Mask Calc?

Subnet Mask Calc has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 3.0 — 2025-07-17

Completely new design.

### 2.0 — 2024-01-31

Bug fixes, full code refactoring.

### 1.5 — 2012-01-28

New ad engine
iOS 5 updates
New look

### 1.3 — 2011-06-13

Fix the rare issues when returning from the background.

### 1.2 — 2011-05-08

new ad engine.

## Apps similar to Subnet Mask Calc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [CIDR Calc](https://appshunter.io/ios/app/cidr-calc/id1565667811) | 5.0 (1) | Free | Utilities |
| [Simple Subnet Calc](https://appshunter.io/ios/app/simple-subnet-calc/id665684290) | 5.0 (1) | Free | Utilities |
| [IP Calcpad](https://appshunter.io/ios/app/ip-calcpad/id1610436312) | — | Free | Utilities |
| [IP Subnet Calculator - IPv4/v6](https://appshunter.io/ios/app/ip-subnet-calculator-ipv4v6/id6479329030) | — | Free | Utilities |
| [IP Tools: Network Insights](https://appshunter.io/ios/app/ip-tools-network-insights/id1446355714) | 4.8 (700) | Free | Utilities |
| [VLSM \| Subnet](https://appshunter.io/ios/app/vlsm-subnet/id6504495906) | — | Free | Utilities |

## More apps by John Rouda

- [Sudoku Game Unlimited](https://appshunter.io/ios/app/sudoku-game-unlimited/id396597126)
- [Drop Blocks](https://appshunter.io/ios/app/drop-blocks/id403305812)
- [Drop Blocks - matching game](https://appshunter.io/ios/app/drop-blocks-matching-game/id408297400)
- [Bubble Pops Strategy Game](https://appshunter.io/ios/app/bubble-pops-strategy-game/id413427295)
- [Daily Bible Read](https://appshunter.io/ios/app/daily-bible-read/id424442645)

All apps by John Rouda: https://appshunter.io/developer/396597129

## Related topics

[ipv4 subnet calculator](https://appshunter.io/ios/topics/ipv4-subnet-calculator) · [ipv4 calculator](https://appshunter.io/ios/topics/ipv4-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*